Shape reconstruction based on FBG flexible sensor

Abstract

In this paper, the shape of the object is reconstructed based on the fiber Bragg grating (FBG) flexible sensor encapsulated by polydimethylsiloxane (PDMS) material, and the influence of the number and layout of the sensors on the reconstruction accuracy of the object is studied. The COMSOL simulation software is used to verify the accuracy of the algorithm, and four sensors are prepared to measure and reconstruct the bent aluminum plate under set conditions. The maximum relative error of the shape reconstruction span is 1.203%, and the maximum relative error of the height is 2.802%. The research results provide the application basis for the shape detection of soft robots.

References

[1] YanJ, LiW, JiangS M, et al.. Shape perception and three-dimensional reconstruction technology of plate structure based on fiber Bragg grating sensor[J]. Chinese journal of lasers, 2020, 47(11):231-240

[2] GuoR Y, BaoY. Research progress on wearable piezoresistive strain sensors based on two-dimensional conductive materials/flexible polymer composites[J]. Fine chemicals, 2021, 38(04):649-661

[3] XuD C, GuoX H. Design and application of capacitive slip sensor[J]. Transducer and microsystem technologies, 2015, 34(11):85-88

[4] GuoY X, YangY H, XiongL. Double-layer orthogonal fiber Bragg gratings flexible shape sensing technology[J]. Optics and precision engineering, 2021, 29(10):2306-2315

[5] YangM, LiuQ D. Movement detection in soft robotic gripper using sinusoidally embedded fiber optic sensor[J]. Sensors, 2020, 20(5):1312

[6] IsmailN N, SharbirinA S. Novel 3D-printed biax ial tilt sensor based on fiber Bragg grating sensing approach[J]. Sensors and actuators A physical, 2021, 330: 112864

[7] GrovesR M, NazeerN, WangX R. Sensing, actuation, and control of the SmartX prototype morphing wing in the wind tunnel[J]. Actuators, 2021, 10(6): 107

[8] ZhuangW, SunG K, LiH. FBG based shape sensing of a silicone octopus tentacle model for soft robotics[J]. Optik-international journal for light and electron optics, 2018, 165: 7-15

[9] WangY, QinN, LiuJ H. Performance test of temperature and pressure flexible sensor based on optical fiber Bragg grating[J]. Chinese journal of scientific instrument, 2019, 40(03):93-98

[10] ZhangS, TaoW, LeeC. Silicon nanowires embedded pressure sensor with annularly grooved diaphragm for sensitivity improvement[C], 2014, New York, IEEE: 14378510